The position of goalie has an inherent romanticism: masked men clad with cool armor, serving as the last line of defense. They play entire games, with an unparalleled ability to impact outcomes. When they're on, they can single-handedly defeat a giant foe. They are the consummate underdogs and towering superheroes all at once.
Nathan Lawson of the Ottawa Senators (born Sept. 29, 1983 in Calgary, AB.)
On March 18, 2014 Lehner started the game, but Lawson came in net at the beginning of the 3rd period. He then had to leave the game after 11:52 minutes due to injury.
I don't have any information on Lawson's mask. (Scott mentioned in a comment below that he thought he remembered Lawson saying the angel was in honor of his wife or family, and that does sound slightly familiar. I might need to look up that Montreal mask and see if I can find more.)
I looked back at Lawson's 2011-12 Montreal mask, and a reader said "The depictions are of his family, and the top illustration is of him being the Guardian." It could be a similar theme with this mask, but I can't say for sure.
The pads above are slightly different from the ones below. The above photo was taken in Nov 2013. I didn't find a photo the March 2014 game, so I don't know if he switched to the pads below.